Peter took one of his friends out to lunch. The lunches cost $100 and he paid 12% sales tax. If Peter left an 18% tip on the $100, how much in total did he pay?

First find the tax. Write 12% as the decimal 0.12 before using it in the equation.

tax

=

tax percentage × amount

=

0.12 × 100

=

12

The tax was $12.

Now find the tip. Write 18% as the decimal 0.18 before using it in the equation.

tip

=

tip percentage × amount

=

0.18 × 100

=

18

The tip was $18.

Finally, find the total cost.

total cost

=

cost + tax + tip

=

100 + 12 + 18

=

130

The total cost was $130.

A store is advertising a sale with 24% off all items in the store. Sales tax is 8%. A 32-inch television is regularly priced at $451. What is the total price of the television, including sales tax, if it was purchased on sale?